Affiliation
American Association of Variable Star Observers (AAVSO)
Sat, 11/25/2017 - 19:46
Hi and thank you for reading this
I mounted a secondary scope piggy back on my C14 comprised of a 61mm William Optics refractor and an ASI1600MM Camera. This System is producing 62 Megabyte science images AFTER I process through Astroimage J.
How do I reduce the FITS size below 50 megs so that I can upload to Vphot?
Thoughts?
Thanks!
Pablo Lewin
Zipping the files will work as VPhot can unpack them. With the proliferation of DSLR and other big formats we will move that 50Mb limit northward when we get to reworking VPhot.
George
I will try zipping them, thank you!
Hi Pablo:
Actually, if you regularly upload 62 MB images, we'll probably curse at you! Even if you zip to upload, they will be opened by VPhot for processing and take space to process. Certainly make sure they are already plate-solved or you will probably crash the system!
I bet that you have selected the default 32 bit floating point format in AIJ to save the image. This is unnecessary! Find out how to save it as 16 bit integer. Also, see if you can crop the image? What is your FOV?
BTW, how did you get the AIJ report into the AAVSO Extended Report Format? Manual processing?
Ken
I'm sorry, I didn't answer your last question Ken. The following is my workflow
1) Capture Science images and calibration files automatically all night with Sequence Generator Pro (two Scopes the C14 with the Sbig8300 and the WO Z61 with an ASI1600mm)
2) Calibrate Science images with AIJ
3) Use Vphot to process and create AAVSO report.
(The C14/Sbig combination creates 33megs calibrated science images, the Z61/ASI1600 creates 62 Megs science images)
I need to find a way to reduce the Z61/ASI1600 62 megs images down to 50 now and oh by the way once I'm done using Vphot for processing and report creation I religiously delete all subs from the Vphot server. There's no need to keep them there since I have Terabytes of disk space to archive what I shoot.
Well I zipped (Rar) the file and I uploaded and disappeared so I'm now going to change try the AIJ save format to 16 bit integer and redo the calibration and will report back.
The FOV is wide on purpose because I want to use that piggyback scope for Astrometric detection of NEOs so it's 2.79 x 2.11 deg.
Back to the drawing board!
I'm not sure that Rar is one of the compression formats that VPhot understands?? You might try another. Also, make sure it was not the same image (time) that you had tried before.
Ken